To Add Parent or Sibling Proxies to an ICP Neighborhood

1. Access the Server Manager, and click the Caching tab.

2. Click the Configure ICP link.

   The Configure ICP page is displayed.

3. In the Parent List section of the page, click the Add button.

   The ICP Parent page is displayed.

   • To add a parent proxy, click Add in the Parent List section of the page.

     The ICP Parent page is displayed.

   • To add a sibling proxy, click Add in the Sibling List section of the page.

     The ICP Sibling page is displayed.

4. In the Machine Address field, type the IP address or host name of the proxy you are adding to the ICP neighborhood.

5. In the ICP Port field, type the port number on which the proxy will listen for ICP messages.

6. (Optional) In the Multicast Address field, type the multicast address to which the parent listens. A multicast address is an IP address to which multiple servers can listen.

   Using a multicast address enables a proxy to send one query to the network that all neighbors who are listening to that multicast address can see. This technique eliminates the need to send a query to each neighbor separately. Using multicast is optional.

   ---

   Note –

   Neighbors in different polling rounds should not listen to the same multicast address.

   ---

7. In the TTL field, type the number of subnets that the multicast message will be forwarded to.

   If the TTL is set to 1, the multicast message will only be forwarded to the local subnet. If the TTL is 2, the message will go to all subnets that are one level away, and so on.

   ---

   Note –

   Multicast enables two unrelated neighbors to send ICP messages to each other. Therefore, to prevent unrelated neighbors from receiving ICP messages from the proxies in your ICP neighborhood, set a low TTL value in the TTL field.

   ---

8. In the Proxy Port field, type the port for the proxy server on the parent.

9. From the Polling Round drop-down list, choose the polling round that you want the parent to be in. The default polling round is 1.

10. Click OK.

11. Click Restart Required.

    The Apply Changes page is displayed.

12. Click the Restart Proxy Server button to apply the changes.